Radiator



Dec, '13, 19323.,

H. N. SHAW RADIATOR Filed July 7, 1930 2 Sheets-Sheet 1 I N VEN TOR.

BY W ATTORNEYJ'v H. N. SHAW Dec. 13, 1932.

RADIATOR 2 Sheets-Sheet 2 Filed July 7, 1930 INVENTOR.

BY 2 W ATTORNEYS.

Patented Dec. 13, 1932 PATENT OFFICE HAROLD N. SHAW, OF MILWAUKEE,WISCONSIN RADIATOR Application filed. July 7, 1930. Serial No. 465,873.

This invention relates to improvements in radiators.

Heretofore, the majority of radiators uti- J lizing heat radiating finshave embodied a circular or rectangular core with continuous fins Woundedgewise thereon, or with separate circular fins positioned in spacedapart relation around the core. In either case, the fins were radiallyextending, and the inner or core-contacting portions were necessarily ofless width than the outer portions. Thus considerable heat wasdissipated before it reached the outer portions of the fins, and W thelatter portions were therefore only partially effective for heatingpurposes. Furthermore, in prior devices the contact be tween the finsand the core has been very poor. In some cases L-shaped fins have beenutilized, the flanges being soldered to the core to secure a bettercontact. In this type, however, the fins must be very short, or the coreor pan will buckle under steam pressure.

it is one of the objects of this invention to provide an, improvedradiator, of the type utilizing heat radiating fins, in which said finsare formed and secured to the core in a novel manner to insureruggedness of construction, even with thin fins, and to provide anefficient contact between the fins and the an... p A further object ofthis invention is to provide a radiator of the type described in whichthe outer edges of the fins are ofno greater length than the inner orcore contacting edges, thus insuring even distribution of heatthroughout all portions of the fins.

A more specific object of the invention is to provide an improvedradiator in which 40 the fins are substantially V-shaped, and aresecured in such a manner within grooves 1n the pan or core that thejoint is placed under a shearing strain as distinguished from a tensilestrain.

A further object of this invention is to provide a radiator in which thefin grooves on one side of the pan cross the grooves on the other sideat the central portion of the pan, and in which said grooves are weldedtogether at the pan to withstand buckling.

the crossing points to increase the ability of A further object of theinvention is to provide a radiator in which normal circulation of thesteam or water in the pan is permitted and short circuiting isprevented, to insure contact of the heating medium with all portions ofthe pan surface.

A further object of this invention is to provide a radiator in whichfree air circulation is permitted over and around all portions of thefins.

A further object of this invention is to provide a radiator which iscomparatively simple and inexpensive to manufacture, durable inconstruction, etficient in operation, and well adapted for the purposedescribed.

With the above and other objects in view, the invention consists of theimproved radiator, and all its parts and combinations as set forth inthe claims, and all equivalents thereof. m

in the accompanying drawings, in which the same reference numeralsdesignate the same parts in all of the views:

Fig. 1 is a side elevation of the improved in Fig. 6.

Referring to the drawings the pan or core 10 is formed of two halfsections, preferably of brass, said sections having edge flanges 11which are welded together. Between the two sections a steam or waterchamber 12 is formed. One of the sections is formed at an upper cornerwith an inclined anertured boss 13 to which a bushing 14 is soldered toprovide an opening for connection-with aniinlet pipe. A similar boss 15and bushing 16 is provided in a lower corner for connection 1 with anoutlet pipe.

grooves 17 which project inwardly approxi- I 19 formed near their inneredges.

mately half of the depth of the pan. The grooves on one side of the panare inclined in the opposite direction from the grooves on the otherside, so that the grooves on the two sides cross one another atintermediate points as shown in Fig. 3. If desired the grooves on thetwo sidesof the pan may be arranged to cross each other at more than onepoint.

Substantially V-shaped fins 18 preferably constructed of copper ,orbrass have grooves Said edges fit within the grooves 17 of the pan, andsaid grooves 17 have projecting ribs 20 which engage the grooves 19 ofthe fins to lock the inner edges of said finsto the pan, as-shown inFig. 2. Solder is also preferably utilized in the grooves 17 toadditionally secure the edges of the fins in place. If desired, thegroove lock may be omitted, and solder alone utilized as in the modifiedform shown in Fig. 4. Due to the depth of the grooves, there is arelatively large contact between the fins and the pan to insure properheat transfer to the fins, and furthermore, there is a soldering area ofsubstantial size which will withstand -'a maximum shearing straincomparable to the tensile strength of the fins.

The interlocking grooves 19 and ribs 20 are preferably intermittent orbroken so that the grooves 19 of the fins can be inserted in I thespaces between the ribs 20 and then slid along to bring the grooves intointerlocking,

engagement with the respective ribs. With the ribs and grooves 1 inchlong and spaced inch apart, a sliding movement of 4 inch will accomplishthe desired locking.

Points on the grooves 17 of the pan and sockets on the fins may besubstituted for the ribs 20 and grooves 19. These locking points andsockets may be formed by a suitable machine after the fins are in place,but before the two halves of the core are assembled.

At the points where the grooves 17 on the two sides of the pan cross oneanother, the grooves are spread out into substantially rectangular formas at 21 (see Fig. 3). The fins are also spread back at these points asindicated at 22 to permiha spot welder contact. It is ordinarilyconsidered difiicult to spotor seam weld brass or copper, but in thepresent invention this is accomplished in a novel manner. A strip ofthin material 23.

which has a relatively high electrical resistance, such as iron,stainless steel, or-nickel chromium, is placed within the chamber 12between the enlarged cross over points of the grooves. The welds 24 areproduced by heat developed in the intermediate material, said heatpenetrating through the brass side portlons. Thus. the grooves at thecross over points are effectively welded together to increase theability of the pan core to withstand steam pressure without buckling. Asa further result of the welded cross over points of the grooves, thesteam or water within the chamber 12 is free to pass from end to end ofthe core, at the top and bottom thereof, but not at the center where thegrooves cross. This insures free steam or Water passage, but preventsshort'circuiting, as the center of the pan is open only to verticalmovement of the fluid. 7

While the inclined cross over grooves are the preferred construction,due to the above pointed out advantages, a fairly efficient constructionis possible without the cross over feature. It is therefore not desiredto be limited to this particular form as the grooves and fins on the twosides of the pan may be arranged parallel to one another, limiting thepath for the heating fluid to the ends of the grooves only. lVith thisconstruction, the grooves may be welded together at one or more pointsor along their entire length where high steam pressures are encountered.

In Fig. 5, a modification is illustrated in which the fins arecontinuous, with the inner ference thereof. Said fins taper upwardly onthe core as shown. The fins have their inner edges soldered to the drum,and are further held in position by means of bands 25 which are drivendown over and around the fins as shown; The drum is provided with upperand lower openings 26 and 27 respectively, to which steam or water pipes28 may be connected.

In use, the heat in the steam or hot water within the core istransferred to the walls of said core, and is then conducted to thefins. Air circulating around the radiator will sweep the outer surfaceof said fins, and will pass through the triangular openings formedbetween the fins and the core, thereby becoming heated. Due to the shapeof the fins, a large heating surface is presented, and'very efficientresults are pro uced with only a small percentage of the cross sectionof the air path obstructedby the radiator.

Although the invention is more particularly adapted for heatingpurposes, it may readily be utilized for refrigerating, drying, aircondensing and ventilating.

Only two forms of drum have been shown, but it is obvious that theparticular shape of this member may be varied and that other changes andmodifications may be made in the construction without departing from thespirit of the invention.

till

Fit .1

It is further to be understood'that the expression substantiallyV-shaped as used in the claims covers fins which are constructed in anysimilar manner so as to provide outwardly extending return bends.

From the above description it may readily be seen that the improvedradiator is-very strong and efiicient in construction, due large- 1y tothe novel shape of the fins, and to the method of firmly securing saidfins to the core. It may further be seen that the device will providefor economical heating, and may be installed in relatively small size,inconspicuous units, because of the large area of heat radiating surfaceprovided by the novel type of fins.

What I claim is:

1. A radiator comprising a core adapted to receive a heating fluid,substantially V- shaped fins projecting from said core, said fins beingadapted to conduct heat from said core and to transfer the same to thesurrounding air, said core being formed with grooves therein forreceiving the edges of said fins, locking means in connection with saidgrooves, and complementary locking means in connection with the fins.

2. A radiator comprising a pan-like core having a plurality of groovesinclined in one direction on one side thereof and having a plurality ofgrooves inclined in the opposite direction on the other side, the rearof said grooves on the two sides crossing one another within the core,means for securing said grooves to one another at the cross over points,and fins projecting outwardly from said grooves.

3. A radiator comprising a. pan-like core having a plurality of groovesinclined in one direction on one side thereof and having a plurality ofgrooves inclined in the opposite direction on the other side, the rearof said grooves on the two sides crossing one another within the core,means for securing said grooves to one another at the cross over points,and substantially if-shaped fins proecting outwardly from said grooves.

d. A radiator comprising a pan-like core having a plurality of groovesinclined in one direction on one side thereof and having a plurality ofgrooves inclined in the opposite direction on the other side, the rearof said grooves onthe two sides crossing one another within the core,said grooves being welded to one another at the cross over points, andfins projecting outwardly from said grooves.

5. A radiator comprising a pan-like core having a plurality of groovesinclined in one direction on one side thereof and having a plurality ofgrooves inclined in the opposite direction on the other side thereof,the rear of said grooves on the two sides crossing one another withinthe core, a strip of thin material having a relatively high electricalresistance within the core extending between the cross over points ofthe grooves, said cross I over pointsbeing welded thereto, and finsprojecting outwardly from said grooves on each side of the pan.

6. A radiator comprising a pan-like core having a plurality ofgrooves'inclined in one direction on one side thereof and having aplurality of grooves inclined in the opposite direction on the otherside thereof, the rear of said grooves on the two sides crossing oneanother within the core, said grooves being enlarged at the cross overpoints, a strip of thin material having a relatively high electricalresistance within the core extending between the cross over points ofthe grooves, said cross over points being welded thereto, and finsprojecting outwardly from' said grooves on each side of the pan.

7. A radiator comprising a pan-like core having a plurality of groovesinclined in one direction on one side thereof and having a plurality ofgrooves inclined in the opposite direction on the other side thereof,the rear of said grooves on the two sides crossing one another withinthe core, said grooves being enlarged at the cross over points, a stripof thin material having a relatively high electrical resistance withinthe core extending be tween the cross over points of the grooves. saidcross over points being welded thereto. and fins projecting outwardlyfrom said grooves on each side of the pan, the edges of sa d fins beingspread back at the enlarged portions of the grooves.

8. A radiator comprising a core adapted to receive a heating fluid, saidcore having grooves formed therein, and said grooves having inwardlyprojecting ribs, and fins projecting from said grooves, the inner edgesof said fins being formed with grooves for inter-locking engagement withthe ribs in the grooves of the pan.

9. A radiator comprising a core adapted to receive a heating fluid, saidcore having grooves formed therein, and said grooves having inwardlyprojecting ribs, and substantially ll-shaped fins projecting from saidgrooves, the inner edges of said fins being formed with grooves forinterlocking engagement with the ribs in the grooves of the pan.

10. A radiator comprising a core adapted to receive a heating fluid,fins projecting from said core for conducting heat therefrom, said corehaving fluid inlet and outlet openings therein, and fittings for saidopenings which are positioned so as to incline outwardly away from thefins.

' 11. A radiator comprising a core adapted to receive a heating fluid,said core havin a plurality of rooves therein, heat trans erring finseach aving an edge positioned withinone of said grooves, and a solderedjoint between a portion of the side of each fin adjacent the inner edgethereof and a side of Nil the groove, said joint being thereby undershearing stress when the core is under pressure.

12. A radiator comprising a pan-like core having a plurality of grooveson each side thereof which project inwardly toward one another withinthe core, means for securing the rear of said grooves on the two sidesof the pan to one another, and fins projecting outwardly from thegrooves.

13. A radiator comprising a corrugated core, heat transferring finshaving ridges p0- sitionable Within the corrugations of said core,locking means in connection with the corrugations of the core, andcomplementary locking means in connect-ion with the fins which arebrought into engaging position by a sliding movement of the fins withinthe corrugations of the core.

14. In a radiator having a pan-like core for receiving a heating fluid,means within said core for obstructing horizontal flow of fluid throughan intermediate portion thereof to prevent said fluid fromshort-circuiting during its circulation through the core.

15. A radiator comprising a core adapted to receive a heating fluid,substantially V- shaped fins projecting from said core, said fins beingadapted to conduct heat from said core and to transfer the same to thesurrounding air, said core being formed with substantially V-shapedgrooves with the sides of each groove diverging outwardly to provide aV- shaped opening between said sides, each groove being thereforecapable of reception of the inner portions of the converging sides oftwo V-shaped fins, and means for securing said sides of the fins withinthe grooves and adjacent the sides thereof.

16. A radiator comprising a core adapted to receive a heating fluid,fins projecting from said core, said fins being adapted to conduct heatfrom the core and to transfer the same to the surrounding air, said corebeing formed with grooves therein for receiving the edges of said fins,lockin means in connection with said grooves, an complementary lockingmeans in connection with the fins.

In testimony whereof I aflix my signature.

HAROLD N. SHAW.

